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/***********************************************************************
tquery4.cpp - Tests other details about template queries, like unquoted
parameters, multiple parameters, and preventing problems with LIKE
patterns. This exists more for code coverage than to demonstrate
the library.
Copyright (c) 2009 by Martin Gallwey and (c) 2009 by Educational
Technology Resources, Inc. Others may also hold copyrights on code
in this file. See the CREDITS.txt file in the top directory of the
distribution for details.
This file is part of MySQL++.
MySQL++ is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
MySQL++ is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public
License along with MySQL++; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
USA
***********************************************************************/
#include "cmdline.h"
#include "printdata.h"
#include <iostream>
using namespace std;
int
main(int argc, char *argv[])
{
// Get database access parameters from command line
mysqlpp::examples::CommandLine cmdline(argc, argv);
if (!cmdline) {
return 1;
}
try {
// Establish the connection to the database server.
mysqlpp::Connection con(mysqlpp::examples::db_name,
cmdline.server(), cmdline.user(), cmdline.pass());
// Modify an item using two named template query parameters
mysqlpp::Query query = con.query("update stock "
"set num = %0:quantity where num < %0:quantity");
query.parse();
query.template_defaults["quantity"] = 70;
cout << "Query: " << query << endl;
mysqlpp::SimpleResult result = query.execute();
// Print the new table contents.
print_stock_table(query);
// Now let's check multiple dissimilar parameter types, and show
// how to avoid conflicts between '%' as used in tqueries vs in
// LIKE patterns.
query.reset();
query << "select * from stock where weight > %0q or "
"description like '%%%1%%'";
query.parse();
cout << "\nQuery: " << query.str(1.2, "Mustard") << endl;
mysqlpp::StoreQueryResult res = query.store(1.2, "Mustard");
// Show what second tquery found
print_stock_rows(res);
}
catch (const mysqlpp::BadQuery& er) {
// Handle any query errors
cerr << "Query error: " << er.what() << endl;
return -1;
}
catch (const mysqlpp::BadConversion& er) {
// Handle bad conversions
cerr << "Conversion error: " << er.what() << endl <<
"\tretrieved data size: " << er.retrieved <<
", actual size: " << er.actual_size << endl;
return -1;
}
catch (const mysqlpp::Exception& er) {
// Catch-all for any other MySQL++ exceptions
cerr << "Error: " << er.what() << endl;
return -1;
}
return 0;
}
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